Is AD 2015-12-06 a recurring Airworthiness Directive?

No — AD 2015-12-06 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2015-12-06 apply to?

AD 2015-12-06 applies to Learjet — models 45. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2015-12-06

one-time

Official AD 2015-12-06 · FR doc 2015-14396 · 2015-06-16 · airframe

Airworthiness Directives; Learjet Inc. Airplanes

What this AD requires

We are adopting a new airworthiness directive (AD) for certain Learjet Inc. Model 45 airplanes. This AD was prompted by reports of non-conforming windshield supports (coupe rails). This AD requires a general visual inspection of the coupe rails to detect gouging and scratches, and to determine if a radius has been removed; an ultrasound inspection to measure the dimensions of the lower coupe rails; an eddy current inspection to detect cracks of the lower coupe rails; replacement of the lower coupe rails if necessary; and revision of the maintenance or inspection program, as applicable. We are issuing this AD to detect and correct non-conforming windshield supports, which could result in uncontrolled cabin depressurization and compromise of the capability of the windshield to withstand a bird strike.

Which aircraft AD 2015-12-06 applies to

MakesLearjet

Models45

Serial-conditional — narrows to serials 45-2000–45-2120, 45-2122–45-2130, 45-005–45-427.

Applies to airplanes identified in Bombardier Recommended Service Bulletin 40-56-03, Revision 1, dated October 15, 2012 (S/Ns 45-2000 through 45-2120 and 45-2122 through 45-2130), and Bombardier Recommended Service Bulletin 45-56-3, Revision 1, dated October 15, 2012 (S/Ns 45-005 through 45-427).

Whether AD 2015-12-06 actually applies to your aircraft (by serial and installed parts) and whether it’s already complied with comes from that aircraft’s records.

How AD compliance is recorded

A valid compliance record (14 CFR 43.9) states:

Method of compliance — The specific action taken (inspected, replaced, modified) and to what revision.

Date — When the work was done.

Aircraft time — Total time in service / tach at compliance — how recurring next-due is computed.

Signature & certificate — The A&P/IA who returned it to service, with certificate number.

Is AD 2015-12-06 complied with on your aircraft?

Tailplate reads a tail number’s logbooks and matches every applicable AD — including this one — to its compliance evidence, with recurring next-due dates computed.

Look up a tail number →Read the full directive (Federal Register)

Applicability is derived from the FAA directive corpus and is advisory, not a legal airworthiness determination. Compliance is established only from an aircraft’s actual records.